Doctor-operating mechanism for calendering-machines.



E. P. WAHI-:38. A DOCTOROPERATINGMECHANISM FOR CALENDERING MACHINES.1,200,400.

DOCTOR OPERATING MECHANISNI FOR CLENDERING MACHINES.

Patented oct. 3, 1916.

2 SHEETS-SHEET 2 APPLICATION FILED DEC. I7 I9I5. 1,200,400.

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narran caricia;

P. 'WALTERS, 0F CAMAS, WASHINGTON.

nos `.11...oie;aa`arii\is ivincHANisM-roa cALENDRING-Maciiiivas-- To allwhom t may concern Be it known that I, EUGENE P. WALTEns, a citizen ofthe United States, and a resident of Camas, Clarke county, State ofWashington, have invented a new and useful Improvenient inDoctor-Operating Mechanism for Calendering-Machines, of'which thefollowing is a specification. l This invention relates to mechanism foroperating the doctors used in v calendering machines. y

One of the main objects of this invention is to provide suitablepower-operated means,- y adapted to simple and flexible control, for

throwing the doctors'into orout of operative position relative to thecalender rolls.

Another ,object is to provide means for regulating the pressure withwhich said doctors bear on the. calender rolls when said doctors are intheir operative position.

I attain these objects of my invention by connecting the doctors to asingle member, to which is imparted longitudinal movement by any means,for example by connecting such member to a piston head reciprocable in acylinder connected to a source of fluid or liquid under pressure, andcontrolling the position of the piston in the cylinder by ad niittingthe operating {iuid or liquid into 0r discharging same from'thecylinder.

In the accompanying drawings: Figure 1 is a vertical section of acalendering machine showing my doctor-operating mechanism as used inconnection. therewith, the

- doctors being -in operative contact with the rolls; Fig. 2 is asectional view of one of the pneumatic means used for positioning thedoctors as desired;` Fig. 3 is a vertical sec-` tion on the line 3 3 ofFig. 1; Fig. 4 is a fragmental view showing a diierent optionalarrangement of my invention: ,and

Fig. 5 is a fragmental view showing still an- `other form in which my.invention may be arranged.

L represents one rof the side frame mem-- bers of a calendering machine,and o are the rolls. rIheI paperl c traverses the fina-.I chine in thedirection indicated by the arrows in Fig. 1. rI he movable doctors CZand the fixed doctor e are arranged on opposite 'sides of theconsecutive rolls. The doctors d are pivotally mounted on blocks j",adapted for vertical adjustment in the vertical guideways g which arefixed. on the frame mem- -jbers a. The doctor e is rigidly mounted on amovable block iii the corresponding Specicaton of Letters Patent.

-Patented oct. s, i916.

\ Application filed December 17, 1915. Serial No.6'7,472.

are the pneumatic cylinders j, in which are reciprocable pistons n. SeeFig. 2. Vertical members 7c are slidably supported in verticalguidew-ays Z, and the upper ends of these-members are connected to thepiston rods m of said-piston heads a. Powerful compression coil springso, underlying the piston heads normally hold the pistons n and therewiththe members 7c in their up position. the lower end of each cylinder j,and a fluid admission conduit g connects the upper end of each. cylinderwith a source of fiuid under pressure, such as air, steam, or water, anda two-way valve r, located in the line of such conduit g, as shown inFig. 1, provides convenient means for controllingthe pressure imposed onthe pistons. Slots s in the longitudinally movable members 7c have pinst which connect the sides of the yoked fulcrumed arms u of the doctorsd. Balance tension springs o connect the ins t with the members 7c atthe opposite en s of the slots haust into the atmosphere. The doctorswill Check-valves 79 are provided in then be in inoperative position,thatis, away.

from the rolls lVhen said 'doctors are to be placed into operativeposition against the rolls,the valve ris' operated so as to admit fluidinto the cylinders j. The members 7c will then be moved downward andthe'lever action exerted will thus throw the doctors into operativeAposition against the calen;A der rolls. By' the operation of the valvefr, the pressure exerted on the piston heads is regulated at will. Itisapparent'that -the cylinders j may be openbottomed,`if so desired.

In ,'Fig. 4 the construction shows but one vcylinder fw instead of two,as in Fig. 2. Said cylinder w is horizontal, and is provided with apiston m having opposed piston rods y, slidable in horizontal guideways2 of the frame. Bell-cranks 4 are pivoted on fixed 110 cai and therotherend being connected to the adjacent .piston rod y. A conduit 6, carryingthe fluid under pressure, is divided into the t\vo`b1anches 7, 8 whicharetconnected to opposite ends of the'cylinder fw. Twoway valves 9 arelocated in each of the two branches, and said valves are provided withoperating levers 10, connected by a link 11, which causes them to movein synchronism. andv in opposite directions. A sprocket'flf2,

\ fixed on the spindle of one of the valves 9,.

carries a drive connection 13 which runs over a hand wheel 14, locatedat a convfiient point in 'reach of the operator. this arrangement ofvalve control, when fluid is admitted in one side of the cylinder, itwill be exhausted from the other side, and

the pistonvwrill move accordingly. l/Vhen the piston movesy to the rightthe members k "will belowered andthe doctors thus thrown into operativeposition, and vice versa.

In Fig, the upper ends ci the members c are provided with armatures andcollars 16. "Expansion springs 17 Munderlying the collars -1(i,--nermally hold'the longitudinally movable members 7c in elevatedposition nS'olenoidsvl' nare circuit with the conductors 19.

20 is a control switch and 21 is a rheostat. NVheTthe-sWitehQOsClOSeithearmatures will be attracted downward so as to lowerl y the members c andthus place the doctors in scribed, including rollsand doctorsv adaptedforl bearing upon the circumference fthe rolls, the combination of alongitudinally movable member, means' connecting the' doctors to saidmember, and adapted to efv movable member, and means for controlling`the application of power.

operative position, and the operation ofthe /rheostat 21 will regulatethe force of attractive pull f'theA solenoids.

The expression power operated meansl for causing the-doctors-tobearonthe rolls with desired force, is used to designate the 1. nfs ritenne5f he @bert r de fect the bearing of the doctors on the rolls, a sourceof power, means actuated thereby which are connected'with and areadapted to effect the movement of the longitudinally cmmections betweenthe a 2. In a machine of the character described, i'ncluding rolls anddoctors adapted ior bearing upon the circumference of the rolls, thelcombinationof a longitudinally' movable member, means yieldinglyconnecting the doctors to said member, and adapted to eect the bearingof the doctors on the rolls, a source of power, means actuated therebywhich are connected With and Vareadapte'd to effect the movement of thelongitudinally movable member, and means for controlling the applicationof powen` 3. In aiwcalendelinghmachine including a bear uponthai-latter, the lcombination of fulcrumed arms supporting said doctors,a

longitudinally movablemembeig connec^ movable member and said arms, afluid operated cylinder-and-piston element, the piston of which isconnected tothe longitudinally movable'member, and..means forcontrolling the' `lmfessure of the operating Quidrinzsaid cylinder. 1 Imnlmahcalendering machine including a .plurality rifulollsl and dofetorsadapted to -hmnnmmmthelattei combination of j fulcrumed arms supportingV-said doctors, a

imlongitudinally;-movable :member provided with .longitudinal slots,pins .extending "through the slots of said member and con- ;'efet i`n ,fij the fulcrumed arms of the doctors with the latter, balance springsadapted to hold' the pins in normal-position in the slots of saidmember, la Huid operated cylinderand-piston element the piston of whichis connected to the longitudinally movable member, and means forcontrolling the pressure of the operating fluid in said cylinder.

EUGENE lr. wALTERs.

VYpluralitymofrollsgandlldoctors adapted to said longitudinally

